Messages in this thread | | | Subject | Re: memcmp in modules | From | Tetsuo Handa <> | Date | Mon, 22 Apr 2013 23:26:05 +0900 |
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Andy Shevchenko wrote: > What did I miss?
Well, as of linux-next-20130422, memcmp() is not correctly exported to modules. Since linux-3.9-rc8 correctly exports memcmp(), this problem seems to be introduced in linux-next tree. Also, this problem seems to involve CONFIG_MODVERSIONS=y.
[root@localhost linux-next]# modprobe ipv6 FATAL: Error inserting ipv6 (/lib/modules/3.9.0-rc8-next-20130422/kernel/net/ipv6/ipv6.ko): Invalid argument [root@localhost linux-next]# dmesg ipv6: no symbol version for memcmp ipv6: Unknown symbol memcmp (err -22)
Since arch/x86/include/asm/string_64.h uses
int memcmp(const void *cs, const void *ct, size_t count);
while arch/x86/include/asm/string_32.h uses
#define memcmp __builtin_memcmp
changing to what you have tried
#define memcmp(a, b, n) __builtin_memcmp(a, b, n)
or changing to what x86_64 does
int memcmp(const void *cs, const void *ct, size_t count);
might solve this problem. But I don't know which one is correct solution...
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